Justin Bieber allegedly egged his neighbor's house

World Premiere of
Singer Justin Bieber arrives at the premiere of the feature film "Justin Bieber's Believe" at Regal Cinemas L.A. Live on Wednesday, Dec. 18, 2013, in Los Angeles. (Photo by Dan Steinberg/Invision/AP)

Former musician and professional twerp, Justin Bieber, is reportedly in trouble (again) after allegedly egging his neighbor's house. Bieber supposedly took a break from his busy schedule of peeing in mop buckets and marginalizing the significance of admired historical figures to throw 20-some eggs at his neighbor's house.

Justin Bieber launched an all out egg assault on his neighbor's home Thursday night  -- and the L.A. County Sheriff was called to the scene while the eggs were still flying ... this according to the alleged victim.

TMZ spoke to the neighbor who says he heard something banging against his house in Calabasas around 7:30 PM Thursday, and when he stepped on to a 2nd floor balcony ... he says he saw Justin down below hurling eggs at his front door.

The Biebz has a shaky history with his neighbors as his parties and fast driving have angered more than one (including Keyshawn Johnson).

TMZ has video of the event, which (obviously) includes a bunch of four-letter words.

We've just obtained video of the incident ... shot by the neighbor, who says Justin was definitely trespassing on his property during the attack. The video is dark, but you can hear the neighbor yelling, "I see you. I f**king see you!" 

Then Justin yells back, "F**k you! I got another one for you, actually! [TMZ]